From Winsor & Newton, these Classic Stretched Canvases are 3/4" deep and ideal for use with oil and acrylic paints. The 100% cotton canvas has a medium texture and is prepared for high performance with a titanium dioxide gesso primer and a finished weight of 12.3 oz. Stretched to perfection by hand with high tension, each canvas includes wood keys for manual re-tensioning. Built to last, the stretcher bars are kiln-dried for warp resistance. The wood used is Spruce, a fast growing sustainable species that ensures a strong wood frame and lighter weight.